Decklist: Allied Creatures in Pioneer Adeline, Resplendent Cathar | Illustration by Bryan Sola Creatures (25) Anim Pakal, Thousandth Moon x2 Gala Greeters x4 Devilish Valet x3 Rumor Gatherer x2 Adeline, Resplendent Cathar x3 Mondrak, Glory Dominus x3 Resolute Reinforcements x3 Jinnie Fay, Jetmir's Second x3 Jetmir, Nexus of Revels x2 Instants (5) Cabaretti Charm x2 Play with Fire x2 Destroy Evil Enchantments (6) Rabble Rousing x2 Fable of the Mirror-Breaker x2 Windcrag Siege x2 Lands (24) Plains x5 Forest x3 Mountain x3 Boseiju, Who Endures x2 Eiganjo, Seat of the Empire x2 Sokenzan, Crucible of Defiance x2 Jetmir's Garden x3 Battlefield Forge Brushland Karplusan Forest Arch of Orazca Sideboard (15) Destroy Evil Lantern Flare x2 Rite of Harmony x2 Tamiyo's Safekeeping x2 Gleeful Demolition x2 Incandescent Aria Rabble Rousing Fable of the Mirror-Breaker Wedding Announcement x3 I took a stab at making a deck for alliance, which fits Pioneer legality

Also resized the sizes to comfortably fit a 100 card deck and a 25 card side-deck (with sleeves)
These include the much talked about Black Lotus (the most valuable card) plus Ancestral Recall, Time Walk, Timetwister, and the five Mox cards (Mox Pearl, Mox Sapphire, Mox Jet, Mox Ruby, and Mox Emerald)
To play multiplayer formats like Commander, many people I know are flocking to Magic Online to play on there with some form of voice chat running in the background with friends
Shadow's effect isn't once per turn , so you want to only cast spells when you have an artifact to tap for them, so no opponent can interact with it and it'll always resolve